Global Smart Mattress Market Size, Share & Demand Report By Product Type (Memory Foam Smart Mattresses, Hybrid Smart Mattresses, Latex Smart Mattresses, Airbed Smart Mattresses), By Application (Residential, Hospitality, Healthcare & Medical Facilities, Wellness Centers and Sleep Clinics), By Distribution Channel (Online Retail, Specialty Mattress Stores, Furniture and Home Retail Chains, Department Stores, Direct-to-Consumer Brand Stores), By Region & Segment Forecasts, 2026–2031